## NORMAL

### Normal

In geometry, a normal is an object such as a line or vector that is perpendicular to a given object. For example, in the two-dimensional case, the normal line to a curve at a given point is the line perpendicular to the tangent line to the curve at the point.

The above text is a snippet from Wikipedia: Normal (geometry)

### normal

#### Noun

1. A line or vector that is perpendicular to another line, surface, or plane.
2. A person who is normal, who fits into mainstream society, as opposed to those who live alternative lifestyles.

1. According to norms or rules.
2. Usual; ordinary.
3. Healthy; not sick or ill.
4. Pertaining to a school to teach teachers how to teach.
5. Of, relating to, or being a solution containing one equivalent weight of solute per litre of solution.
6. Describing a straight chain isomer of an aliphatic hydrocarbon, or an aliphatic compound in which a substituent is in the 1- position of such a hydrocarbon.
7. (Of a mode in an oscillating system) In which all parts of an object vibrate at the same frequency; See .
8. Perpendicular to a tangent line or derivative of a surface in Euclidean space.
9. (Of a subgroup) whose cosets form a group.
10. (Of a field extension of a field K) which is the splitting field of a family of polynomials in K.
11. (Of a distribution) which has a very specific bell curve shape.
12. (Of a family of continuous functions) which is pre-compact.
13. (Of a function from the ordinals to the ordinals) which is strictly monotonically increasing and continuous with respect to the order topology.
14. (Of a matrix) which commutes with its conjugate transpose.
15. (Of a Hilbert space operator) which commutes with its adjoint.
16. (Of an epimorphism) which is the cokernel of some morphism.
17. (Of a monomorphism) which is the kernel of some morphism.
18. (Of a morphism) which is a normal epimorphism or a normal monomorphism.
19. (Of a category) in which every monomorphism is normal.
20. (Of a real number) whose digits, in any base representation, enjoy a uniform distribution.
21. (Of a topology) in which disjoint closed sets can be separated by disjoint neighborhoods.
22. in the default position, set for the most frequently used route.

The above text is a snippet from Wiktionary: normal